The term California's Santa ANITA Derby refers to a Grade 1 American Thoroughbred horse race held annually at the Santa ANITA Park in Arcadia, California. The race is open to three-year-old horses and is run over a distance of 1 1/8 miles on dirt. The winner of the race is awarded a purse of $1 million. The most recent winner of the race was ANITA, a three-year-old filly owned by Kaleem Shah and trained by Bob Baffert.